6x^2+25x+14<=0
    4x^2-29x-24<=0
     ( 2 * x ^ 2 - x + 1 ) / ( 2 * x + 1 ) >0
    （2x^2-x+1）/（2x+1）＞0
    2/x＞-1
    (3x+1)/（2x-1）＜2
    （x+1）/（x-1）≥0
     (-0.35*x*x*x+0.8575*x*x+0.1715*x-0.060025)>0
    (0.7*x-0.49)>0
    (-0.5*x*x+1.05*x)>0
    (-0.5*x*x + 2.1*x-0.245)>0
    (-1.05*x*x*x+0.735*x*x+0.343*x-0.12005)>0
    -x*x+1.4*x>0
    -1.05*x+1.5*x*x>0
    -1.05*x-1.5*x*x>0
    -x*x + 2.8*x-0.49>0
    -0.25*x*x*x*x+0.3*x^3+0.63*x*x-0.108*x>0
    -x*x+0.6*x>0
    0.5*x*x*x*x+0.6*x*x*x+0.54*x*x-0.324*x>0
    0.5*x*x*x*x-1.8*x*x*x+0.9*x*x-0.324*x>0

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